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Show 1870.J MR. J. BRAZIER ON NEW LAND-SHELLS. 659 section of the genus, distinguished by the general pale colour shell and animal, the very slight indication of the dorsal keel, and by the peculiar distribution of colour on the crown of the head. Rhinoclemmys mexicana. 1. RHINOCLEMMYS MEXICANA. Thorax oblong, slightly and bluntly keeled only in front, over the vertebral plates, dark brown, slightly mottled ; dorsal and marginal shields thin; the first vertebral shield nearly square, four-sided, the second and third oblong, transverse, six-sided ; sternum slightly raised on the sides, truncated in front and notched behind; dark brown, with an irregular yellow margin; head brown ; throat and sides of the head yellow, black-spotted; crown dark brown, with a narrow white streak over the nostrils towards the orbits, with a broad white lunate band behind, with its front edge just even with the eyes, and with an indistinct broad pale streak on each side of the occiput. Hab. Mexico ; San Juan del Rio (Rebouch). CHELODINA. CHELODINA EXPANSA, Gray. (Plate XXXIV., young.) This species was first described in the Society's ' Proceedings' for 1856 (p. 370), and the young shell was described and was intended to have been figured. The engraving was made of it at the time, but not published; it is therefore appended to this paper. 11. Descriptions of Ten N e w Species of Land-shells, collected by Mr. W . F. Petterd, of Hobart Town, Tasmania. By J O H N BRAZIER, C.M.Z.S. 1. HELIX (CHAROPA) CURACOA, n. s. Shell rather widely umbilicated, depressed, thin, very closely and finely plicately ribbed, interstices smooth, white, not shining; spire |